Gemstone



FIG. 1 is a top perspective view of the present new design of a gemstone;

FIG. 2 is a front elevational view of the present gemstone; the left side view, the right side view, and rear elevational view thereof are all the same as this front elevational view;

FIG. 3 is a top plan view of the present gemstone;

FIG. 4 is a bottom plan view of the present gemstone; and,

FIG. 5 is an enlarged front elevational view of the girdle portion of the present gemstone shown in FIG. 2. 

The ornamental design for a gemstone, as shown and described. 